Radiation sensitive apparatus for detecting



T L i S DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published atthe request of the applicant or owner in accordance with the Notice ofApr. 11, 1968, 849 0.G. 1221. Identification is by serial number of theapplication and the heading indicates the number of pages ofspecification, including claims. and of sheets of drawing contained inthe application as originally filed. The tile of this application isavailable to the public for inspection; reproduction may be purchasedfor 30 cents per sheet.

Applications published under the Defensive Publication Program have notbeen examined as to the merits or alleged invention. The Patent Oflicemakes no assertion as to the novelty of the disclosed subject matter.

PUBLISHED APRIL 29, 1969 751,270 RADIATION SENSITIVE APPARATUS FORDETECTING ROTATING YARN PACKAGE DEFECTS Gerald Irving Buckson, Newark,and John Albert Masino,

Eugene J. Sturdevant, and Stanley Victor Williams,

Wilmington, Del., assignors to E. I. du Pont de Nemours and Company,Wilmington, Del., a corporation of Delaware Filed Aug. 8, 1968.Published Apr. 29, 1969 Int. Cl. G01n 21/30; H01j 39/12, 3/14 US. Cl.250-219 3 Sheets Drawing. 16 Pages Specification An apparatus fordetecting package formation defects on the end surface of a rotatingcylindrical yarn package wherein at least two parallel strips of lightare projected onto the end surface. The illuminated portions of the endsurface are viewed and the illumination therefrom is directed tophotosensitive means which detects variations in the intensity of theillumination and emits electrical signals equivalent thereto. Electroniccomponents are provided to amplify and discriminate signals receivedfrom the photodetectors in order to detect and record defects exceedingpredetermined levels. Means are also provided to segregate inspectedpackages having unacceptable package end formations. A duplicateapparatus arrangement is provided for simultaneously inspecting both endsurfaces of the package.

31 April 29, 1969 G. BUCKSON ETAL DEF. PUB.

RADIATION SENSITIVE APPARATUS FOR DETECTING ROTATING YARN PACKAGEDEFECTS Filed Aug. 8, 1968 Sheet 1 of 3 INVENTORS GERALD IRVING BUCKSUNJOHN ALBERT HASINO EUGENE J. STURDEVANT STANLEY VICTOR WILLIAMS ATTORNEYDEF. PUB.

SN-75l270 Sheet 2 of a G- BUCKSON ET AL RADIATION SENSITIVE APPARATUSFOR DETECTING ROTATING YARN PACKAGE DEFECTS 9 6w 1 8 9 2 m an d r m A RFIG. 3 CENTERLINE OF I"" OPTICAL UNIT AND INVENTORS GERALD IRVINGBUCIISON JOHN ALBERT MASINO EUGENE J. STURDEVANT STANLEY VICTOR WILLIAMSBY Alm ATTORNEY April 29, 1969 G. 1. BUCKSON ETAL SN-75l270 RADIATIONSENSITIVE APPARATUS FOR DETECTING ROTATING YARN PACKAGE DEFECTS SheetFiled Aug. 8 1968 M s R O F. E T. 0 N s E H G W E rt 1 T R s l YT S F. mS 7 7d 6/ 2 3 w 7 V .l R 0 M F. M 6 6:3 In A R 4 6 w I A G 0 R R F. l N9 6 if} SEGREGATING 5 DEVICE GERALD invmc aucxsou JOHN ALBERT HASINOEUGENE ATTORNEY

